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Accumulated Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
 
Foreign currency translation adjustment
(Amount in thousands)
 
Unrealized gain (loss) on available-for-sale securities
(Amount in thousands)
 
Accumulated Other Comprehensive Income (Loss)
(Amount in thousands)
Beginning balance at December 31, 2012
$
501

 
$
8

 
$
509

Change during the year
506

 
—

 
506

Ending balance at December 31, 2013
$
1,007

 
$
8

 
$
1,015

Change during the year
(1,431
)
 
(15
)
 
(1,446
)
Ending balance at December 31, 2014
$
(424
)
 
$
(7
)
 
$
(431
)